Oil-pump.



No. 805,530. PATENTED NOV. 28, 1905. J. B. DAVIS.-

OIL PUMP.

APPLICATION FILED MAR.27,1905.

2 SHEETS-SHEET 1.

W'TNESSES ,5. I IWENTDR PATENTED NOV. 28, 1905.

J. B. DAVIS.

OIL PUMP.

APPLICATION FILED 11,111.27, 1905.

2 SHEETS-SHEET 2.

' llllllill-Ililllll' JOHN B. DAVIS, OF DAYTON, OHIO.

OIL-PUMP.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed March 27, 1905. Serial No. 252,172.

1'0 all whom it may concern:

Be it known that I, J OHN B. DAvIs, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Oil-Pumps; and I do declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figu res of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in oil-pumps of the class which is used to dispense oil in the retail trade.

The object of the invention is to provide a pump of the above type which is adapted for pumping heavier oils than the ordinary kerosene or gasolene, thereby curtailing the lengths of the cylinders, dispensing with the use, of packing for the piston-rods, avoiding the capping of the cylinders, and'preventing the gumming of the pistons and cylinders.

The pump, as shown in the drawings, is of the duplex type, and in carrying out the objects of the invention it is completely submerged in oil, being in a horizontal position. Owing to thus placing the cylinders there is at all times sufficient quantity of oil within the tank to prime the pump, or, in other words, the pump is at all times in a condition for operation.

Preceding a detail description of the inven tion reference is made to the accompanying drawings, of which Figure 1 is a top plan view showing the oiltank in section and the duplex pump in position therein, portions of the cylinders being broken away to show the pistons. Fig. 2 is avertical sectional elevation of the tank, showing the pump in position submerged in-oil. Fig. 3 is a front elevation of the pump, the cylinders appearing in section. Fig. 4 is a sectional view on the line a; x of Fig. 3, showing the arrangement of the cylinder-valves. Fig. 5 is a detail view of the actuating-handle.

In a detail description of the invention similar reference characters indicate corresponding parts.

In carrying out my invention I employ any suitable dimension of tank 1, which has its bottom provided with a suitable cavity or space 2, in which the pump is placed submerged beneath the oil, as shown in Fig. 2. This space 2 is always full of oil, so that the pump is never dry. As before stated, the position of the pump is horizontal.

Referring now in detail to the pump construction, this consists of two cylinders 3 and 4, which are arranged in parallel positions and are located, as before stated, within the recess 2. This recess in the bottom of the tank is provided in order that the pump may always be submerged in oil and that it may thus be kept in a primed condition. When the tank proper is emptied, this bottom recess 2 still retains a sufficient quantity of oil to submerge the pump. These cylinders are united to a pump-cap 5, their ends being screwed into said cap, and this cap provides an opening 6 for the inlet-valve 6 and an opening 7 for the outlet-valve 7 for each cylinder and an intermediate chamber 8, through which the oil passes from each pump-cylinder independently. In other words, when one cylinder is filling through its inlet-valve 6 the other cylinder is discharging through its outlet-valve 7. The positions of the valves are necessarily vertical in this arrangement of the pump, and the outlet valves 7 are necessarily above. The outlet-valves 7 communicate with a common discharge-pipe 9 through a common chamber 10. (Shown in dotted lines in Fig. In the latter figure one of the outlet-valves is shown removed from its seat by pressure, and in which position it is discharging through the chamber 10 to the outlet-pipe 9, and at the same time the lower right-hand inlet-valve 6 is admitting oil to the next cylinder to refill it.

11 designates a forward bracket for the guidance and support of the racks 12, the latter constituting piston-rods joined to pistons 13. 14 is a tie-rod or brace which lies between the cylinders and parallel therewith and connects or braces the pump-cap 5 with said bracket 11. The pump-cap 5 and the bracket 11 are provided with feet 15, by means of which the pump is attached to a suitable base or board 16, which is placed within the recess 2 in the tank, thereby insuring a proper placing of the pump.

Meshing with the racks 12 is a driving-pinion 17, which occupies a position necessarily parallel with the racks and has extended from it in a suitable manner a shaft 18 at a right angle to the racks. The lower end of said shaft is set; in a boss 19 in the center of the bracket 11, and said shaft 18 is suitably journaled in the top of the tank and projects above said top, where it receives a pinion 20, that is engaged by a segment-gear 21 on an operating-handle 22. The operating-handle 22 is fulcrumed at 23 on the upper side of the tank, and both the shaft 18 and the fulcrum of said lever is inclosed by a journal-plate 24:, which lies on the top of the tank and is secured in such position. The turning-points of the lever and the shaft are thus always maintained in a proper alinement and are prevented from any suitable lateral shifting. This operatinghandle 22 is a convenient way of operating the pinion 17; but it may be stated that an operating-handle may be employed with a bevelgear engaging a similar bevel-gear in place of the pinion 20, or a crank-handle may be employed with a bevelgear. It will be understood that in each opposite movement of the operating-handle 22 one of the cylinders is filled and the other is emptied, and thus there is absolutely no lost motion in the operation of the pump.

The pump, as before stated, has the advantages of being always in an operative condition and being at all times submerged in oil, the cylinders and pistons being preserved in a clean and effective condition free from gumming.

While I have shown and described in the foregoing specification a measuring -pump consisting of double cylinders submerged in oil, it is feasible to employ a single cylinder in the same manner. Of course this would decrease the capacity of the pump, as is well known; but the advantages due to the submerging of the pump would be the same in either case.

Having described my invention, I claim 1. In an oil-pump, a tank having in the bottom thereof a recess or compartment specially adapted to contain the pump, a pump at all times submerged in oil by reason of its occupying such compartment, such pump consisting of two cylinders lying horizontally within said compartment, each of said cylinders having an inlet and outlet valve occupying perpendicular positions, the said valves contained in a single pump-cap which unites the ends of the cylinders, pistons moving in said cylinders, racks connected with said pistons, means for maintaining said racks in horizontal positions, a pinion engaging both racks, and an operating-shaft extending vertically from said pinion and provided with means on the exterior of the tank for rotating said shaft to impart movement to the pump-pistons.

2. In an oil-pump, a tank having a pumpchamber in its bottom, in combination with two cylinder-pumps located within said pumpchamber and submerged in oil, a pump-cap uniting said cylinders and providing valvechambers for each cylinder for the admission and discharge of oil, pistons movable within said cylinders, racks connected with said cylinders, a pinion engaging said racks, a shaft projecting vertically from said pinion and extendingon the exterior of the tank, and means I consisting of a segment-gear and a pinion for rotating said shaft to alternately operate the pistons to charge and discharge the cylinders.

3. In an oil-pump, a tank havinga recessed portion in its bottom providing a special chamber for the retention of oil, a pump horizontal within said chamber in a position to be submerged with oil at all times, the cylinders of said pump having inlet and outlet valves arranged in vertical alinement, pistons movable within said cylinders, racks connected with said pistons, a bracket providing guiding-supports for said racks, a pinion engaging said racks, a shaft extending from said pinion at right angles to said racks, and means on the exterior of the tank for rotating said shaft.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN B. DAVIS. 

